Final answer:
The ratio RF represents the relative frequency of students scoring between 90 to 100 percent in Mr. Ahab's class, calculated as 0.075 or 7.5% when 3 out of 40 students achieve this score range.
Step-by-step explanation:
The question pertains to finding a ratio in a specific context described in what seems to be a hypothetical scenario.
Given the example where f represents the number of students who scored between ninety to one hundred percent in Mr. Ahab's class, n represents the total number of students in the class, and RF represents the relative frequency or ratio of those students to the entire class.
In the presented example, if f = 3 students received a score between 90 to 100 percent out of n = 40 students in total, the ratio RF is calculated as RF = f / n = 3 / 40 = 0.075.
Therefore, the ratio or relative frequency RF is 0.075, which can also be expressed as 7.5 percent of the students receiving a score between 90 to 100 percent.